Carburetor



Aug, 26, 1935. s. D. Ross CARBURETOR Filed May 16, 1934 2 Sheets-Sheet 1 1 Stan/ e1, D. Ross I I l FUFIIII ll Aug. 20, 1935. 's. D. ROSS 2,011,912 I CARBURETOR Filed May 16, 1934 2 Sheets-Sheet 2 STHNDHED Is/vmo/v TEHNsFcJBMEE caNrkoL FUEL L IN: N

SCa'nIe -D. Ross Patented Aug. 2c, 1935 u oAancanron Stanley D. Ross, Vancouver, British Columbia,

Canada Application May 16, 1934, Serial No. 726,006

3 Claims.

7 This invention relates to improvements in oil burning apparatus ;of the positive pressure type and designed specifically for use with .my new process of carburetion, and volume and pressurecontrolled rotary pump, and also for use with an v principally of standard manufactured units which are purchaseable on the open markets in quantities.

auxiliary vacuum tank having a high lift and globuliferous feed; all of which are subject matters of co-pending applications filed May 16, 1934, Serial Nos. 726,005, 726,007 and 726,008.

A particular object of my present'invention is to provide an oil burning apparatus composed at favourable prices, whereby an economically as sembled unit maybe produced which has passed all inspection of authorizedibodies, whereby the purchaser of such an outfit may be assuredof having secured an apparatus of high grade manufacture that will not affect or endanger the insurance of any premises'upon which such apparatus is installed.

Another object of my invention is to eliminate the use of expensive and specially designed castings inthe fabrication of the oil burner proper,

as with the exception of the base and compressor, no other castings are used, as all the other parts of the apparatus are constructed from'standard materials purchaseable in theopen market upon which minor operations are carried out, thereby enabling the production'of a high grade oil burnis a standard-ignition transformer it and below ing apparatus at an economical price.

Still another object of my invention has been I to produce an eflicient oil burning apparatus for use without the necessity of having to use high pressure blower fans to support combustion within the furnace, thereby providing lowered stack and flue temperatures through the use of natural draught, and providing a greater measure of economy in operation by eliminating such stack and flue losses. 7

A still further object of my invention has been to provide an efficient oil burning apparatus hav ther illustrated in the accompanying'drawings forming part of thisapplication, and in which:

Figure l is a plan view of the oil burning apparatus showing the positioning of the motor, the V vacuum tank and the compressor pump.

Figure 2 is an elevation of the oil burning appa- N. oFFicsf ratus within its cabinet showing the positioni'ng of the various units incombination with the electrical; control mechanisms.-

- Figure 3 is a. section of the needle control and air intake block taken on the line 33' of Figure 1 showing the restricted passage at the endof the lJ-loop. u

Figure 4 is a section of the needle control and air intake block taken on the line 4- 1 of Figure l and shows the needle valve control to the air intake and vacuum connectionto the vacuum tank- Figure 5 is a cross section. ofthe T fitting I4 showing the restricted passages.

In these drawings like numerals indicate like .f. 1 parts, andthe numeral 5 indicates an electric 5 motor mounted upon a shelf 2 within a cabinetl3."

Attached to the motor through a flexible couplinginot shown) is a rotary pump andcompressor 4 having an intake block fittingt on the motor side and a dischargeblock fittingt on the opposite side.

The block 5 communicates with the intake port 29, while the block .6 communicates with the outlet port 30. p

' Mounted'below the motor I and upon the opposite side of the cabinet 3 to whichthepurnpy ii is mounted, isa standard vacuum v tank 'l havthe usual fuel supply line 8 and vacuum line i! and atmospheric vent It).

the pump a standard set of controls 28.

Secured immediately below the motor shelf 2 it I. i

The motor l'hasthe usual cor-inector box l2 7 secured upon one sideof it, but as the wiring cir- In the end' ofthe' U-loop l5, where it connects into the side of the intake block'fitting 5, is a restricted passage It,'and likewise in the bottom of the Tfitting M is a restricted passage l1. 3

Upon the end of the discharge block fitting 6 is provided a connection l8 for attaching the fuel line leading to the burnernozzle positioned within a the furnace. Uponthe'upper side of the fitting 6 ismount e-' o te s havingan elbow'fitting 20 at the top to which is connected the copper tubing 2i connected into the side of theTfittingl l. H

The terminal fitting of the tubingZI, where it connects into the side of the T I4, has a restricted passage 22 in the end thereof. (See Figure 5.)

The stand pipe I 9 is in communication with the discharge opening or passage through the block fitting 6. i I

In the outer end of the intake block fitting 5 is secured the vacuum connection 23 connected to the vacuum line 9 of the vacuum tank 1.

Below the block fitting 5 is, the air intake 24 leading to the air filter pipe or breather 25.

On top of the block fitting 5 is positioned the from the main supply tank to flow through the fuel supply line 8 and supply the vacuum tank I From the tank I the oil flows through the fuel line 13 .to the T M, which is positioned slightly below the oil line in the vacuum tank I where it meets the, restricted passage I! through which only a limited or measured quantity can flow.

As the' oil rises above the restriction I! by reason of the vacuumexerted upon the fuel line 13 via pipe I5 by the pump 4, it meets with a positive pressure stream from the restricted passage 22in the side of the T M. set up from the discharge side of the pump through the stand pipe {Sand tubing 2|, the result of which is that the limited supply of oil rising: above the restricted passage .IT is aspirated and broken up, and formed into bubbles or air in oil envelopes which rise in the line I3 until theyreach the inverted -U-loop i5 and restricted passage !6 through which the bubbles are passed and burst, and the resultant vapour meets the incoming stream of air from the air intake 24 and is aflined therewith-"tobe drawn into the pump 4' and discharged upon. the opposite side through the connection l8 fordelivery to the burner nozzle positioned within the furnace.

What is meant by the positive pressure acting through the restriction 23 is' as follows: A part of the discharge from the pump 4 is deflected into the pipe I9 and thence down the pipe 2|.and through the restricted passage 22 to be discharged into'the T Mysuch action iscaused by the factthat there is always sufiicient back pressure in the discharge l8 of the pump to cause a part'of the pumps discharge to be so deflected up the pipe l9 as the nozzle to which the discharge outlet 18 connects has an opening of limited degree, and this is the reason'for the accumulation of pressure in the discharge 18 to cause the deflection of positivepressure up the pipe l9 and no induction is setup in the pipes i9 and'2|. H The action of he rupturing of the bubbles at theyjunctionoi the air intake 24 results in the very finest ofatomization possible as the oil film envelopes areunder exceptional tension by reason ,ofbeing formed by thepositive pressure stream entering through the restricted passage 22 and are of a more attenuated structure than is possible with'an induced current stream.

Another particular resulting from the use of positive pressure to create air in oil envelopes or bubbles is thatmuch heavier oils can .be atomized and broken upinto bubbles than is possible with induction systems; i

Having now described my invention and the nature of same, what I claim and desire to be protected in by Letters Patent, is:

1. In a portable and positive pressure type oil burning apparatus, a rotary pump having a discharge outlet, astandard vacuum tank positioned adjacently, a duct connecting said tank to the intake side of said rotary pump, said duct comprising a T fitting, a U-loop and :airintake and control valve, said T fitting positioned slightly below the oil level in said tank, a restricted oil passage formed in the bottom of said T, a re-' stricted pressure passage formed in the side of said T, said pressure passage being connected by a .duct to the discharge side of said rotary pump whereby when said pump is operating an oil flow is set up in said duct and through said restricted oil passage to be formed into bubbles under the action of the pressure stream from the discharge side of said rotary pump entering said duct through the restricted passage formed in the side of said T to form a combustible mixture for ultimate delivery to said discharge outlet.

2. In a portable and positive pressure type oil burning apparatus, a ro'tarypump having a discharge'outlet, a standard vacuum tank positioned adjacently, a duct connecting said tank to the intake side of said rotary pump, said duct comprising a T fitting, a U-loop and air intake and control valve, said T fitting positioned slightly below the oil level in said tank, a restricted oil passage formed inthe bottom of said T, a restricted pressure passage formed in the side of said T, said vpressure passage being connected by a duct to the discharge side of said rotarypump whereby when said pump is operating an oil flow is set up in said duct and through said restricted oil passage to be formed into bubbles above said restricted passages under po'sitivepressure from the discharge side of said pump, and means to rupture said bubbles before the latter are drawn into said pump to form a combustible mixture for ultimate delivery to said discharge outlet. 1

3. In a portable andpositive pressure type oil burning apparatus, a rotary pump having a discharge outlet, a standard vacuum tank positioned adjacently, a duct connecting said tank to the intake side of said rotary pump, said duct comprising a T fitting, a U-loop and air intake and control valve, said Tfitting positioned slightly below the oii level in said tank, a restricted oil passage formed in the-bottom of said T, a restricted pressure passage formed in the side of said T, said pressure passage being connected by a duct 'tothe discharge side of said rotary pump whereby when said pump is operating an oil flow is set up in said duct and through said restriated oil passage to be formed into bubbles above said restricted passages under positive pressure fromthe discharge side of said pump, and means to rupture said bubbles before the latter are drawn into said pump, said means comprising a restricted passage formed at the terminal of said U-loop and its place of connection to said air intake andcontrol valve whereby said bubbles are forced through said restricted passage under the combined action of the suction and pressure discharge stream of said pump and ruptured by an air stream entering through said air intake and control valve: by reason of the suction of said rotary pump to form .a combustible mixture for ultimate delivery to said discharge outlet.

STANLEY D. ROSS. 

